EP2711091B1 - Application device for masses capable of flowing - Google Patents

Description

The invention relates to a discharge device for extruding flowable masses from cartridges. The discharge device is intended in particular for the removal of polymethyl methacrylate bone cements.

In orthopedics and accident surgery, PMMA bone cements are very often used for the mechanical fixation of joint endoprostheses. The squeezing of cartridges by means of compressed gases is known per se.

Already in 1954 was in the US 2,818,999 A proposed a sealing gun, which contained a gas cartridge in the handle. The compressed gas of the gas cartridge pushed after opening the cartridge a delivery piston within a cartridge in the direction of the cartridge head. The flow of the pasty mass was controlled by a central rod passing through the cartridge which could close the outlet of the cartridge.

In the US 3,938,709 A of 1976 A discharge device is described in which by gas pressure a tube which is located within the hollow gun body is expressed. The gas flow is controlled by a simple pen valve with spring, which can be operated by a hand lever. A device for discharging the gas was not available. This means that despite the interruption of the gas supply, the gun will repress the material due to the existing residual pressure.

The EP 0 169 533 A2 of 1985 discloses a viscous agent injection device. In this, after interruption of the pressurized gas supply, the squeezing does not proceed, because an injection control valve which interrupts the flow of the viscous agent is arranged at the discharge opening. It is interesting that through the valve element of the trigger handle once the gas supply and at the same time the exit of the viscous agent can be controlled. The injection control valve closes when it is not pressurized with compressed gas.

In the US 4,925,061 A a similar system is described. However, in which the injection control valve is operated via a rod which is connected to the trigger handle.

The EP 1 118 313 A1 discloses a gun for squeezing bone cement. The drive is also done by a gas cartridge. It is essential that this very complex system has a rod which is intended to expel the amount of cement contained in the discharge pipe. This elegant technical solution is very well suited for conventional polymethyl methacrylate bone cements. For cartridge systems for mixing several components with a static mixer, however, this gun is not usable. In addition, the production of this gun is very expensive.

The US Pat. No. 3,308,990 discloses a squeezing device with a porous filter through which a compressed CO ₂ gas is passed as drive medium.

In the US 2004/0074927 A1 is described an ejection gun, which has substantially the same features as in US 4,925,061 A disclosed and in the publications US 2005/0230433 A1 . US 2005/0247740 A1 and US 6,935,541 B1 the basically same technical solution is proposed, which is based on the EP 0 169 533 A2 already known.

The WO 2008/109439 A1 discloses a compressed gas driven discharge device that uses a hydraulic medium to which the compressed gas is forced.

It should be noted that the hitherto known discharge devices, which are driven by gas cartridges and have a complex mechanical structure, for the manufacture of disposable items only partially or not at all suitable. The proposed technical solutions are also difficult to perform as plastic injection molded parts.

In modern vacuum mixing systems, the cement is produced in a cartridge by mixing the polymer powder with the monomer liquid. The cement paste formed is then pressed out of the cartridge and applied by means of a manually operated squeezing device. The manual Auspressvorgang is perceived by many users because of the required manual force as unpleasant. Therefore, in the generic DE 10 2010 019 222 A1 as well as the generic DE 10 2010 019 224 B3 proposed gas-operated Auspressvorrichtungen. These devices are preferably made of inexpensive plastic and intended for single use only. In these devices, a rotary valve has generally been proposed. These devices use pressurized gas as a drive means, which is taken from compressed gas cartridges, which are located inside the devices. With compressed gas delivery piston can be applied directly by cement cartridges and thus moved to squeeze. Particularly advantageous is the use of compressed gas cartridges with carbon dioxide, which is present in the gas cartridges as a liquid. When using such discharge devices shows that a discharge of pasty masses with the aid of the evaporating carbon dioxide is possible. The pressure generated by evaporating carbon dioxide at room temperature of about 55 bar is quite sufficient to squeeze out highly viscous bone cements, such as Palacos® R + G, from cartridges.

The disadvantage, however, is that sometimes only part of the liquid carbon dioxide in the discharge evaporates and liquid carbon dioxide penetrates to the delivery piston. As a result, as a result of the uncontrolled re-evaporation in the space between the delivery piston and the valve element, there are pressure peaks which lead to undesired short-term accelerations of the delivery pistons. This disturbs the precise regulation of the discharge process.

The object of the invention is therefore to overcome the disadvantages of the prior art. The invention is based on the object to develop a simple as possible, easy-to-use discharge device for flowable masses. This should allow precise regulation of the discharge process of flowable materials using liquid carbon dioxide or another easily evaporable liquid gas. The term flowable masses are both liquid, viscous and viscous, viscous masses that flow only when pressurized understood. The discharge of the flowable masses should be carried out by compressed liquefied gas, in particular by carbon dioxide, which is taken from a gas cartridge or a gas cartridge, which is located in the device or can be connected thereto. When using carbon dioxide cartridges, the carbon dioxide is present in liquid form in the gas cartridge. The device should consist of as few parts as possible, which can be produced by inexpensive injection molding with conventional plastics. The aim is further that the discharge device is suitable as a disposable disposable article.

Therefore, the object of the invention was achieved by a discharge device for discharging flowable masses of cartridges, wherein the discharge device comprises a base body, a connection element for a gas cartridge on the base body, a valve element for regulating a gas flow from the gas cartridge and a gas-permeable channel, which the connection element with the valve element, wherein in the gas-permeable channel at least one evaporation vessel is arranged so that the gas flow from the gas cartridge is at least partially passed through the evaporation vessel, wherein the gas-permeable channel comprises two connecting elements, which are connected to the evaporation vessel, so that the Gas flow from the gas cartridge between the connecting elements flows through the evaporation vessel, and wherein the connecting elements are not connected to the evaporation vessel at opposite walls of the evaporation vessel.

It can be provided that the evaporation container has a larger cross-section than the gas-permeable channel, preferably at least twice as large a cross section, more preferably at least ten times as large cross-section.

Furthermore, it can be provided that the evaporation container has a volume which is at least half as large, preferably at least as large as the volume of a liquid compressed gas in the gas cartridge, which is provided for connection to the connection element or which is connected to the connection element.

By means of these design variants, it can be ensured that liquid constituents of the gas stream in the evaporation vessel have sufficient space to separate from the gas stream and to pass into the gaseous state.

The invention provides that the gas-permeable channel comprises two connecting elements, which are connected to the evaporation tank, so that the gas flow from the gas cartridge between the connecting elements flows through the evaporation tank.

In this way, the evaporation tank can be exchanged or subsequently fitted and thereby adapted to the system, in particular to the volume of the gas cartridge. But even if the fasteners are firmly and permanently connected to the evaporation vessel, there is the advantage that a stable connection and an inexpensive production of the discharge device according to the invention are possible.

It is provided that the connecting elements are not connected to opposite walls of the evaporation vessel with the evaporation vessel, wherein preferably the connecting elements are connected on the same side with the evaporation vessel.

This measure ensures that the liquid constituents of the gas stream do not simply move through the gas-permeable channel due to their inertia and thus reach the valve element or further. The stronger the diversion of the gas stream in the evaporation vessel and the better the gravitational attraction can be utilized for the separation, the more effectively a separation of the gas stream from the liquid constituents can take place. For the same reason it can be provided according to the invention that the gas-permeable channel is wound, in particular has at least two changes of direction.

Furthermore, it can be provided that a gas-impermeable wall is arranged in the base body between the connecting elements.

The wall should also lead to a separation of the gas flow from the liquid components as efficiently as possible. In addition, thereby the liquid Compressed gas does not pass directly from the first connecting element to the second connecting element. The liquid compressed gas is forced into the evaporation tank.

In a particularly preferred embodiment of the invention can be provided that in a normal and thus intended use of the discharge device for discharging a flowable mass from a cartridge, the evaporation container is arranged in the discharge that the two openings of the gas-permeable channel in the evaporation tank not bottom side are connected to the evaporation vessel, so that liquid components of the gas stream collect on the bottom side in the evaporation vessel, wherein preferably the openings of the gas-permeable channel are arranged in the evaporation vessel in the upper region of the evaporation vessel, are particularly preferably arranged in the top wall of the evaporation vessel.

By this arrangement, gravity can be used to separate the liquid components from the gas stream. In addition, the liquid components can not flow in the direction of the rotary valve through the gas-permeable channel.

Furthermore, it can be provided that the discharge device has a handle, wherein the evaporation container is at least partially disposed in the handle, preferably the evaporation container is arranged substantially in the handle, particularly preferably the evaporation container is arranged in the handle.

The housing of the evaporation vessel or a part thereof ensures that the discharge device is always held so that the gravitation can do its part to separate the liquid components from the gas flow. In addition, the handle facilitates the operability of the discharge.

To provide the most complete discharge device can be provided that the discharge device includes a gas cartridge, preferably a compressed gas cartridge, in particular a filled with liquid carbon dioxide gas cartridge.

According to a development of the invention it can be provided that a sealing element for connecting the gas cartridge is provided on the connection element.

By the sealing element, an unwanted loss of the flowing gas at the connection can be avoided.

It can further be provided that an adapter unit for connecting cartridges is arranged on the base body, wherein in the base body, a second and a third gas-permeable channel is provided, which connect the valve element with the outside of the adapter unit.

With this structure, different cartridges can be connected to the discharge device. In addition, the additional gas-permeable channels increase the ease of use of the discharge.

It can be provided that at least one pressure relief valve and / or at least one sterile filter is connected to the third channel or can be connected via the valve element and the pressure relief valve and / or the sterile filter is connected via an opening in the base body with the surrounding atmosphere, wherein the opening not arranged in the adapter unit.

Pressure relief valves and sterile filters contribute to safety in the operation and the application of discharge devices according to the invention.

Preferred discharge devices can provide that the valve element has a first gas channel for regulating the compressed gas flow and preferably additionally has a second gas channel, which is arranged so that upon actuation of the valve element, an interruption of the first gas channel takes place and the second gas channel is opened, so that the second gas channel is connected via the body permeable to gas with the surrounding atmosphere.

These measures increase the ease of use of the discharge device.

It can also be provided that the evaporation container and / or the base body consists of plastic, preferably of polyethylene.

Furthermore, it can be provided that the discharge device consists of more than 90% plastic, preferably polyethylene, polyoxymethylene, polyamide or Teflon exists. The evaporation container can be economically produced by blow molding. In addition, the production can also be carried out by injection molding.

In this way, a particularly cost-effective production of the discharge device can be achieved.

In the context of the invention, all other conceivable materials are also suitable which are suitable for the production of pressure-resistant evaporation containers. For example, evaporation containers can also be made of metal and preferably of aluminum or aluminum alloys.

An advantageous embodiment of discharge devices according to the invention is that optionally at least one pressure relief valve (safety relief valve) is connected to at least one gas-permeable channel which connects the outside of the cartridge fitting gas permeable to the valve member, wherein the pressure relief valve connected to the atmosphere surrounding the outside of the body gas permeable is. The pressure relief valve may be formed, for example, as a simple ball pressure relief valve. It opens only from a predetermined internal pressure. The overpressure valve serves to ensure the bursting safety of the discharge device by blowing off the excess gas in the surrounding atmosphere in the case of excessive compressive stress.

It has proven to be particularly advantageous if two pressure relief valves are connected in succession to the gas-permeable channel or particularly preferably the second gas-permeable channel, so that even in the case of very unlikely failure of a pressure relief valve, the bursting safety of the device ensured by the function of the second pressure relief valve is.

A further advantageous embodiment of the invention is that the valve element has a first gas channel for regulating the pressure gas flow and a second gas channel, which is arranged so that upon actuation of the valve element with the interruption of the first gas channel of the second gas channel is opened, with a is connected in the valve element arranged third gas channel, which is connected in a gas-permeable manner with the surrounding atmosphere. That means that after closing of the first gas passage through the second gas passage and third gas passage, the gas behind the valve element under pressure is blown into the surrounding atmosphere. As a result, the pressurization of the delivery piston of the cartridge is terminated immediately and a run-on of the cement dough is prevented. Furthermore, this increases the handling safety of the discharge considerably.

The objects of the invention are also achieved by the use of a discharge device according to the invention for expressing a flowable mass from a cartridge, in which a vaporizing liquid gas from a gas cartridge in the evaporation vessel is passed and the vaporized gas from the evaporation vessel via a controllable valve element to a delivery piston of the Cartridge is passed, wherein the gas pressure propels the delivery piston and the flowable mass is expelled by the propulsion of the delivery piston from the cartridge.

The invention is based on the surprising finding that the gas flow can be easily and continuously regulated by actuation of a valve element by means of an evaporation container, which is arranged between the gas cartridge and the valve element, because liquid compressed gas, which flows out of the gas cartridge, is evaporated in the evaporation tank before the valve element. As a result, the passage of liquid compressed gas through the valve element is avoided. It can thus not re-evaporate liquid pressurized gas in the space between the delivery piston and the valve element, whereby unwanted pressure peaks can be avoided. Unintentional propelling of the delivery piston in the cartridge when the valve element is closed can thus also be avoided according to the invention.

A further advantage is that the pressure load for the discharge device is reduced by avoiding pressure peaks and thus the risk of bursting of the discharge device or of parts thereof is reduced. Another advantage is that with the simultaneous use of pressure relief valves (safety relief valves) in the discharge due to the non-occurrence of pressure peaks significantly less compressed gas is blown off via the pressure relief valves than in a discharge without evaporation tank. As a result, more compressed gas is available for discharging the flowable masses. It can thereby smaller Gas cartridges are used with a smaller amount of liquid pressurized gas.

1. a) einem Kunststoffkörper,
2. b) einem Anschlusselement für eine Gaspatrone am Kunststoffkörper,
3. c) eine Gaspatrone mit Flüssiggas,
4. d) einem Dichtungselement für eine Gaspatrone im Anschlusselement der Gaspatrone,
5. e) einem Öffnungsmittel für eine Gaspatrone im Anschlusselement,
6. f) einem gasdurchlässigen Kanal vom Anschlusselement der Gaspatrone bis zu einem Verbindungselement 1,
7. g) einem gasdurchlässigen Kanal vom Verbindungselement 2 bis zu dem Ventilelement,
8. h) einem Ventilelement,
9. i) eine Adaptereinheit am Kunststoffkörper zum Konnektieren von Kartuschen,
10. j) wenigstens zwei gasdurchlässige Kanäle, welche die Außenseite der Adaptereinheit mit dem Ventilelement gasdurchlässig verbinden,

wobei ein Verdampfungsbehälter mit mindestens zwei Öffnungen in dem gasdurchlässigen Kanälen angeordnet ist, wobei eine erste Öffnung gasdurchlässig mit dem Verbindungselement und eine zweite Öffnung gasdurchlässig mit dem Verbindungselement verbunden sind.An inventive discharge device can be constructed, for example

1. a) a plastic body,
2. b) a connection element for a gas cartridge on the plastic body,
3. c) a gas cartridge with LPG,
4. d) a sealing element for a gas cartridge in the connecting element of the gas cartridge,
5. e) an opening means for a gas cartridge in the connection element,
6. f) a gas-permeable channel from the connecting element of the gas cartridge to a connecting element 1,
7. g) a gas-permeable channel from the connecting element 2 to the valve element,
8. h) a valve element,
9. i) an adapter unit on the plastic body for connecting cartridges,
10. j) at least two gas-permeable channels, which connect the outside of the adapter unit to the valve element in a gas-permeable manner,

wherein an evaporation container is arranged with at least two openings in the gas-permeable channels, wherein a first opening is connected in a gas-permeable manner with the connecting element and a second opening in a gas-permeable manner with the connecting element.

Figur 1:

eine schematische Querschnittansicht einer erfindungsgemäßen Austragsvorrichtung; und

Figur 2:

eine schematische Querschnittansicht einer weiteren erfindungsgemäßen Austragsvorrichtung ohne Kartusche und ohne Gaspatrone.

Exemplary embodiments of the invention will be explained below with reference to two diagrammatically illustrated figures, without, however, limiting the invention. Showing:

FIG. 1:

a schematic cross-sectional view of a discharge device according to the invention; and

FIG. 2:

a schematic cross-sectional view of another dispensing device according to the invention without cartridge and without gas cartridge.

FIG. 1 shows a schematic cross-sectional view of a discharge device according to the invention with a base body 1 at the front of a large diameter cartridge first connector 4 are arranged for large diameter cartridges and a smaller diameter cartridge connector 6 for smaller diameter cartridges. Fixing devices 20, 21 in the form of internal threads for fixing cartridges with external threads (not shown) are provided on the cylinder inner walls of the cartridge connecting pieces 4, 6. The fixation devices 20, 21 can also be realized by means of threads, thread cutouts or pins for locking the cartridges in the cartridge connecting pieces 4, 6.

On the underside or the bottom side of the discharge device, a pistol grip 8 is provided with which the discharge device can be held in one hand. The underside or the bottom side of the discharge device is the side of the discharge device, which in the case of a normal and thus intended use of the discharge device for discharging a flowable mass from a cartridge in the direction of the bottom, therefore points downward. The arrangement of the pistol grip 8 makes the bottom-side direction clear.

In the rear wall of the second, inner cartridge connection piece 6 are two openings 25, which open into two front-side gas-permeable channels 30 in the base body 1. The front gas-permeable channels 30 are in the image plane after FIG. 1 arranged one behind the other. The front gas-permeable channel 30 extends to a valve member 10 which is formed as a rotary valve with a cylindrical valve seat. In the form of a T-piece, the front channel is connected to a pressure relief valve 29. The rear gas permeable channel 30, which is not actually in the cutting plane, but is still drawn to illustrate the entirety of the construction of the discharge device, kinks upwards (in FIG. 1 indicated by the dotted line) and there flows through a second pressure relief valve 28 to the outside in the environment, that is, in the atmosphere surrounding the discharge. In the joints connecting the front gas-permeable channels 30 to the environment, sterile filters (not shown) may be arranged to ensure that contamination of the interior of the discharge device can not occur.

In the cartridge connector 6 with the smaller diameter, a cartridge 26 is fixed, which closes tightly with the cartridge connector 6. This ensures that a gas pressure directed through one of the openings 25 to the bottom of the fixed cartridge 26 can also act on a delivery piston 27 of the cartridge 26 arranged on the side of the cartridge bottom, and not between the cartridge 26 and the cartridge connection pieces 6 escapes. For this purpose, sealing elements (not shown) may be provided in the cartridge connection pieces 4, 6 and / or on the cartridges 26, in particular on the cartridge bottoms. But it may also be sufficient to provide a tight fixing device 20, 21, which may be realized for example by a thread.

In a cylindrical opening in the base body 1 is the rotary valve body 10 with partially rotationally symmetrical geometry, which is about its axis of symmetry (perpendicular to the in FIG. 1 shown sectional plane) is rotatably mounted in the base body 1. In the valve element 10 is a first gas channel 12, which extends straight through the rotary valve body 10. At 20 ° offset from the openings of the gas channel 12 in the cylinder jacket of the rotary valve body 10 are sealing cams 16 which serve to seal the gas-permeable channel 30 and a rear gas-permeable channel 35 in the base body 1, when the rotary valve body 10 is rotated to the closed position, the in FIG. 1 is shown.

In the rear part of the main body 1, a rear gas-permeable channel 35 is arranged, which opens into an opening in the valve seat to the rotary valve body 10. With the sealing cam 16, the openings to the gas-permeable channels 30, 35 in the valve seat of the rotary valve 10 are gas-tight and closed to a pressure of seventy bar pressure seal. On the, the back of the discharge facing side of the Base 1 opens the rear gas-permeable channel 35 in a hollow, open on both sides mandrel 36 with a passage.

With an additionally provided discharge channel (not shown), a gas pressure bearing in the region of the cartridge connection pieces 4, 6 on the delivery piston 27 of the connected cartridge 26 can be discharged. For this purpose, a further gas channel (not shown) can be arranged in the rotary valve body 10, via which a third opening adjacent to the openings 25 with the an additional front third gas channel (not shown) can be connected at a suitable position of the rotary valve body. For closing the openings in the valve seat for this purpose, additional sealing cams (not shown) would preferably be provided in this case. In the rotary valve body 10 are then two along the axis of symmetry of the rotary valve body 10 offset gas channels 12, which are additionally rotated about this symmetry axis against each other, arranged. The offset gas channels 12, of which in FIG. 1 only one is shown are then arranged in such a rotary valve body 10 and the gas-permeable channels 30, 35 arranged in the base body 1, that at two positions of the rotary valve body 10, which are adjustable by rotation of the rotary valve body 10 against the base body 1 in the valve seat, a Front gas-permeable channel 30 with the rear gas-permeable channel 35 via the gas channel 12 or the discharge channel (not shown) are interconnected, with all other gas-permeable channels 30, 35 are closed by the sealing cam 16 of the rotary valve body 10 pressure-tight. The width of the front opening 25 to the rotary valve body 10, which opens into the front gas-permeable channel 30 may also be sufficient that each of the gas channels 12 in the rotary valve body 10 with the then only front gas-permeable channel 30 is connectable.

On the rotary valve body 10 is on a side that protrudes from the base body 1, a key element (not shown) arranged, in which a control element (not shown) engages with matching counterpart to rotate the rotary valve 10 in the valve seat of the body 1.

The mandrel 36 protrudes into a cavity in the rear part of the main body 1, which is suitable for receiving a gas cartridge 42. The gas cartridge 42 is filled with liquid carbon dioxide. The mandrel 36 serves to open a gas cartridge 42 whose opening side is pressed onto the mandrel 36. At the rear end of the cavity is inside a Locking device 44 and the outside of the base body 1, a fastening means 46 arranged in the form of an external thread. The locking device 44 serves to prevent unwanted movement of a cap 70, with which the discharge is closed on the back. The locking device 44 can for this purpose engage in locking hooks 48 which are arranged on the closure cap 70. The fastening means 46 serves to securely connect the closure cap 70 to the main body 1, thereby pressing the gas cartridge 42 onto the mandrel 36 and thus opening it. For this purpose, a fastening means 50 in the form of an internal thread is provided on the closure cap 70.

In the rear gas-permeable channel 35, an evaporation tank 38 is arranged, which is located in the pistol grip 8 of the discharge device. The rear gas-permeable channel 35 is for this purpose bent down in the direction of the pistol grip 8 at two locations, so that the two downwardly facing ends of the rear gas-permeable channel 35 open in a lid surface in the evaporation tank 38. The escaping from the gas cartridge 42 carbon dioxide is thus passed through the evaporation tank 38 when passing through the back gas-permeable channel 35. Instead of carbon dioxide, another liquefied gas under pressure can be used, which is evaporated to produce the gas stream.

The evaporation tank 38 has a cross section ten times larger than the backside gas permeable channel 35 and a volume about as large as the volume of liquid carbon dioxide in a new (not yet opened) gas cartridge 42.

When liquid carbon dioxide exits the gas cartridge 42, it passes through the rear gas permeable passage 35 into the evaporation tank 38 and collects there at the bottom of the evaporation tank 38. In the evaporation tank 38, the liquid carbon dioxide vaporizes and is passed through the back gas permeable passage 35 to the valve element 10 , When the valve element 10 is in the open position (not in FIG FIG. 1 shown), then flows through the fully evaporated carbon dioxide gas channel 12 in the valve element 10 and then through the associated front gas-permeable channel 30 to the bottom side of the cartridge 26 in the cartridge connector 6. There pushes the gas pressure of carbon dioxide on the delivery piston 27 and drives it in the cartridge 26 forward and through the cartridge contents (a flowable mass, such as a bone cement) forward out of the cartridge 26, where the cartridge contents can be applied.

When the valve element 10 is closed (in FIG. 1 shown position) will relieve the pressure on the delivery piston 27 very quickly and so the propulsion of the delivery piston 27 stopped very quickly. By the evaporation tank 38 is thereby ensured in a simple manner and cost-effective manner that no liquid carbon dioxide passes through the gas-permeable channels 30, 35 and through the gas channel 12 to the cartridge connector 4, 6 or into the front gas-permeable channel 30 and this liquid carbon dioxide intermittently evaporates, expands its volume and thereby generates a pressure surge, which leads to an unwanted uneven propulsion of the delivery piston 27 and to an unwanted blowout of the gas through the pressure relief valves 28, 29th

The cartridge 26 and the gas cartridge 42 may also be separate parts that do not belong to the discharge device.

FIG. 2 shows a schematic cross-sectional view of another embodiment of a discharge device according to the invention. On a main body 101 made of polyethylene is a cartridge connector 104 for connecting a cartridge with a bottom-side delivery piston. In the main body 101 is a front-side (directed to the cartridge connector 104) gas-permeable channel 130 which extends from a valve member 110 to an opening 25 in the cartridge connector 104.

At the rear end of the discharge device opposite the cartridge connection piece 104, a connection 145 for a gas cartridge is arranged. In the port 145, an internal thread 146 is provided as a fastening means into which an external thread on a matching gas cartridge (not shown) can be screwed. Following 145 is on the main body 101, a hollow mandrel 136 is provided as a connection element with which the gas cartridge is opened when it is screwed into the internal thread 146.

The hollow mandrel 136 is connected to the valve element 110 via two parts of a rear gas permeable channel 135, two tubes 134 and an evaporation container 138, which form a gas permeable channel. In the valve element 110 there is a gas channel 112 which, in a suitable position of the valve element 110, connects the connection or channel, which is formed by the rear gas-permeable channel 135, the hoses 134 and the evaporation container 138, to the front gas-permeable channel 130 in a gas-permeable manner ,

The evaporation tank 138 has like the evaporation tank 38 after FIG. 1 the task liquid components that enter the compound or the channel to evaporate, and thus to prevent that liquid liquefied gas components reach the cartridge connector 104 or in the front gas-permeable channel 130.

The features of the invention disclosed in the foregoing description, as well as the claims, figures and embodiments may be essential both individually and in any combination for the realization of the invention in its various embodiments.

LIST OF REFERENCE NUMBERS

1, 101

body

4

Cartridge connector with large diameter

6

Cartridge fitting with a small diameter

8th

pistol butt

10, 110

Valve element / rotary valve body

12,112

gas channel

16

sealing cam

20, 21

fixation device

25

Opening in the cartridge connector

26

cartridge

27

delivery piston

28, 29

Pressure relief valve

30, 35

Gas permeable channel

36, 136

Hollow spike

37

drain channel

38, 138

Evaporation tank

42

gas cartridge

44

locking device

46, 146

fastener

48

locking hooks

50

fastener

70

cap

104

Cartridge connector

134

tube

130, 135

Gas permeable channel

145

connection

Claims (15)

1. Dispensing device for the dispensation of flowable masses from cartridges (26), whereby the dispensing device comprises
   a main body (1, 101),
   a connecting element (36, 136) for a gas cartridge (42) on the main body (1, 101),
   a valve element (10, 110) for regulation of a gas flow from the gas cartridge (42), and
   a gas-permeable channel (35, 134, 135) that connects the connecting element (36, 136, 145) to the valve element (10, 110), characterised in that
   at least one evaporation container (38, 138) is arranged in the gas-permeable channel (35, 134, 135) such that the gas flow from the gas cartridge (42) is guided through the evaporation container (38, 138), at least over regions thereof, whereby the gas-permeable channel (35, 134, 135) comprises two connecting elements that are connected to the evaporation container (38, 138) such that the gas flow from the gas cartridge (42) flows between the connecting elements through the evaporation container (38, 130), and
   whereby the connecting elements are not connected to the evaporation container (38, 138) on opposite walls of the evaporation container (38, 138).
2. Dispensing device according to claim 1, characterised in that
   the evaporation container (38, 138) has a larger cross-section than the gas-permeable channel (35, 134, 135), preferably a cross-section that is at least twice as large, particularly preferably a cross-section that it is at least ten times as large.
3. Dispensing device according to claim 1 or 2, characterised in that
   the evaporation container (38, 138) comprises a volume that is at least half as large, preferably at least as large as the volume of a liquid compressed gas in the gas cartridge (42), which is provided for connection to the connecting element (36, 136) or which is connected to the connecting element (36, 136).
4. Dispensing device according to any one of the preceding claims, characterised in that
   the connecting elements are connected to the evaporation container (38, 138) on the same side.
5. Dispensing device according to any one of the preceding claims, characterised in that
   the gas-permeable channel (35, 134, 135) is tortuous, in particular comprises at least two changes of direction.
6. Dispensing device according to any one of the preceding claims, characterised in that
   a gas-imprimatur wall is arranged between the connecting elements in the main body (1, 101).
7. Dispensing device according to any one of the preceding claims, characterised in that,
   for a normal and intended use of the dispensing device for dispensation of a flowable mass from a cartridge (26), the evaporation container (38, 138) is arranged appropriately in the dispensation device such that the two openings of the gas-permeable channel (35, 134, 135) leading into the evaporation container (38, 138) are not connected on the floor side to the evaporation container (38, 138) such that liquid components of the gas flow collect on the floor side in the evaporation container (38, 138), whereby the openings of the gas-permeable channel (35, 134, 135) leading into the evaporation container (38, 138) preferably are arranged in the upper region of the evaporation container (38, 138), particularly preferably are arranged in the top wall of the evaporation container (38, 138).
8. Dispensing device according to any one of the preceding claims, characterised in that
   the dispensation device comprises a handle (8), whereby at least regions of the evaporation container (38, 138) are arranged in the handle (8), preferably the evaporation container (38, 138) is essentially arranged in the handle (8), particularly preferably the evaporation container (38, 138) is arranged in the handle (8).
9. Dispensing device according to any one of the preceding claims, characterised in that
   the dispensing device includes a gas cartridge (42), preferably a compressed gas cartridge (42), in particular a liquid carbon dioxide-filled gas cartridge (42).
10. Dispensing device according to any one of the preceding claims, characterised in that
    a sealing element for connection of the gas cartridge (42) is provided on the connecting element (36, 136).
11. Dispensing device according to any one of the preceding claims, characterised in that
    an adapter unit (4, 6, 104) for connection of cartridges (26) is arranged on the main body (1, 101), whereby a second and a third gas-permeable channel (30, 130) connecting the valve element (10, 110) to the outside of the adapter unit (4, 6, 104) are provided in the main body (1, 101).
12. Dispensing device according to claim 11, characterised in that
    at least one overpressure valve (28, 29) and/or at least one sterile filter is connected to the third channel (30) or can be connected via the valve element (10, 110), and the overpressure valve (28, 29) and/or the sterile filter is/are connected to the ambient atmosphere via an opening in the main body (1, 101), whereby the opening is not arranged in the adapter unit (4, 6, 104).
13. Dispensing device according to any one of the preceding claims, characterised in that
    the valve element (10, 110) comprises a first gas channel (12, 112) for regulation of the compressed gas flow and preferably comprises, in addition, a second gas channel that is arranged appropriately such that, upon actuation of the valve element (10, 110), the first gas channel (12, 112) is being interrupted and the second gas channel is being opened such that the second gas channel is connected in gas-permeable manner to the ambient atmosphere via the main body (1, 101).
14. Dispensing device according to any one of the preceding claims, characterised in that
    the evaporation container (38, 138) and/or the main body (1, 101) consists of plastics, preferably of polyethylene.
15. Use of a dispensing device according to any one of the preceding claims for extruding a flowable mass from a cartridge (26), in which an liquid gas that can be evaporated is guided from a gas cartridge (42) into the evaporation container (38, 138) and the evaporated gas is guided from the evaporation container (38, 138) via a valve element (10, 110) that can be regulated to a feed plunger (27) of the cartridge (26), whereby the gas pressure propels the feed plunger (27) and the flowable mass is expelled from the cartridge (26) by the propulsion of the feed plunger (27).

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